Tubular hot-air furnace



R. HITCHEN.

TUBULAR HOT AIR FURNACE.

APPLICATION FILED JAN. 31. 1922.

Patented Aug. 22, 1922.

2 SHEETSSHEET l.

R. HITCHEN.

TUBULAR HOT AIR FURNACE.

APPLICATION FILED LAN. 31. 1922.

Patented Aug. 22, 1922;

2 SHEETS-SHEET 2.

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TUBULAR HOT-AIR rnnnncn.

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Specification of Letters Patent.

Patented Aug. 22,

Application filed January 31, 1922. Serial No. 533,074;

To all whom it may concern:

Be. it known that I, RoBnR'r Hiroiinn, a citizen of the United States, residing at Kewanee, in the county of Henry and State of Illinois, have invented certain new and useful Improvements in Tubular Hot-Air Furnaces, of which the following is a specification, reference being had therein to the accompanying drawings. a

This invention relates to furnaces and more particularly to a tubular hot air furnace.

The object of the invention is the construction of an eflicient and durable furnace, which will heat air and water at the same time, and with the heated air cause steam or vapor to be mixed, or mingle.

Another object is the construction of a furnace that is provided with means for heating water, at the same time air is heated for heating a building or dwelling, the heated water being utilized for many purposes, such as use in a bath-room, in a sink, or in a garage, and the like.

With these and other objects in View, my invention comprises certain novel combina tions, constructions and arrangements of parts as will be hereinafter described, illustrated in the accompanying drawings, and more particularly pointed out in the appended claims.

In the drawings:

Figure 1 is a vertical, sectional view of a furnace constructed in accordance with the present invention.

Figure 2 is a sectional view, taken on line 22, Fig. 1, and looking in the direction of the arrows.

Figure 3 is a sectional view,taken on line 33, Fig. 1, and looking in the direction of the arrows.

Figure 4- is a sectional View, taken on line 4- 1, Fig. 1, and looking in the direction of the arrows.

Referring to the drawings by numerals, 1 designates the furnace casing, in which is positioned the fire-box 2, around which is water jacket 3. The fire-box is provided with grate i, and under the grate is the ash pit 5. Ashes are removed from the ash pit by means of door 6, whereas fuel is supplied to the fire-box by means of door 7 (dotted lines).

Cold air inlets 88 are formed upon the casing 1 for allowing air to enter directly from the cellar or basement in which the furnace is positioned, and air inlet 9 is provided for connection with piping that opens upon the outside of a building so that cold air from the outside may be allowed to pass into the furnace.

The water jacket may be provided with outlet. and inlet pipes 1010 which may communicate with a bath, or a lavatory, or a sink, or a radiator; there may be as many pipes 10 connected to the water a-cket, as the operator desires. Tubes 11 are connected to a gravity tank (Figs. 1 and 3), not shown.

Metal tubes 12 are arranged in crossed po sition, Figs. 1 and 3, within the fire-box 2, permitting fresh air to. pass through the tubes and be greatly heated by the fire coming in direct contact with said tubes.

A humidifier receptacle 13 is fastened upon the outside of the fire-box 2, just under the auxiliary casing 14. A vertical pipe 15 communicates at its lower end with the inside of water jacket 3, and its upper end discharges into receptacle 13; this pipe is provided with a manually-operated valve 16, whereby the amount of water, passing through pipe 15 and discharged into receptacle 13, can be adjusted by the operator reaching through the outlet 9. The more water dropped or discharged into the receptacle, the more steam will be generated and pass up with the heated air into the rooms of the building.

Extending through the auxiliary casing 14 is a hollow drum 15 allowing the air to pass through the same and be heated, for the flames from the fuel in fire-box 2 not only strike against tubes 12 but will also come in contact with the hollow drum 15.

The top of the auxiliary casing 14 is provided with a tubular extension 17 opening into smoke pipe 18; smoke pipe 18 extends through the casing 1, to a flue (not shown) in any suitable manner.

The casing 1 is provided with a hot air outlet 19. I

A horizontal baffle plate 20 is connected to the casing 1 and the fire-box 2 under the auxiliary casing 15. Baffle plates 21 (dotted lines) are fastened within the casing 1, being partly held against the fire-box 2, as shown in Figs. 2 and 3.

The baffle plates act as braces and fastening means to assist in holding the parts tosaid casin gethenand also serve to cause the air to airculate around the fire box in the hot. air

chamber, Within easing 1. p

While I have de 'eribed the preferred emvbodiment of my invention, andhave illustrated the same in the accompanying draw ings, certain minor changes or alterations may appear to one skilled in the art to Winch this invention relates during the extensive hanging at its upper end said humidifier reeeptacle said pipe provided With a valve naeaeee contiguous to one of the" inlets of the furnace casing, a smoke pipe, and means connecting said smoke pipe to said fire-box.

2. In an apparatus of the class described, the combination of a furnace casing provided with inlets andan outlet, at fire-box in said casing, a Water jacket formed upon said fire-box, an auxiliary casing on the upper end of said fire-box and overhanging the same, a humidifier receptacle on the side of the lire-box and under said auxiliary casing, a valved-pipe positioned contiguous to one oi? sai d inlets of the furnace casing and con- :tcd atone end to the-Water jaeket and discharging at its other end into said humidifier receptaole, a hollow drum in said auxiliary casing av smoke pipe, and means connecting said smoke pipe to said auxiliary casing. 1 e

In testimony whereof I hereunto afiiX my signature.v e

ROBERT HiToHnN; 

